Join in Windows Active Directory Domain with Samba Winbind.
This tutorial needs Windows Active Directory Domain Service in your LAN.
This example shows to configure on the environment below.
Domain Server : Windows Server 2008 R2
Domain Name : E-FD3S0
Realm : E-FD3S.SERVER.WORLD
Hostname : e-fd3s.server.world

[1] Install Winbind.

[root@lan ~]# yum -y install samba-winbind samba-winbind-clients pam_krb5

[2] Configure Winbind.

# replace ifcfg-xxx to your own environment
[root@lan ~]# vi /etc/sysconfig/network-scripts/ifcfg-eno16777736
# change to the DNS to AD's one
DNS1=10.0.0.150
[root@lan ~]# systemctl restart network

DISABLED SELinux in  /etc/sysconfig/selinux

[3] Join in Windows Active Directory Domain.

# join in Active Directory ( net ads join -U [AD's admin user])

[root@lan ~]# net ads join -U Administrator 
Enter Serverworld's password:
Using short domain name -- E-FD3S0
Joined 'LAN' to dns domain 'e-fd3s.server.world'
DNS Update for lan.server.world failed: ERROR_DNS_UPDATE_FAILED
DNS update failed: NT_STATUS_UNSUCCESSFUL

[root@lan ~]# systemctl start winbind 
[root@lan ~]# systemctl enable winbind
# show domain info
[root@lan ~]# net ads info 
LDAP server: 10.0.0.150
LDAP server name: e-fd3s.e-fd3s.server.world
Realm: E-FD3S.SERVER.WORLD
Bind Path: dc=E-FD3S,dc=SERVER,dc=WORLD
LDAP port: 389
Server time: Sun, 07 Sep 2014 21:31:27 JST
KDC server: 10.0.0.150
Server time offset: -3

# show AD users info
[root@lan ~]# wbinfo -u 
administrator
guest
serverworld
krbtgt

# show AD groups info
[root@lan ~]# wbinfo -g 
domain computers
domain controllers
schema admins
enterprise admins
cert publishers
domain admins
domain users
domain guests
group policy creator owners
ras and ias servers
allowed rodc password replication group
denied rodc password replication group
read-only domain controllers
enterprise read-only domain controllers
dnsadmins
dnsupdateproxy

# switch to an AD user
[root@lan ~]# su - serverworld 
Creating directory '/home/serverworld'.
[serverworld@lan ~]$